US3621369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic voltage regulating apparatus for ac generator with antihunt means
Assignee: Fuji Electric Co Ltd
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Filing: 1970-01-02
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Granted: 1971-11-16
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Expires: 1990-01-02
Abstract
Abstract An automatic voltage regulating apparatus for an AC generator, comprising an instantaneous voltage change detecting means with a blind sector which acts to impart its output to the automatic voltage regulator only when the instantaneous voltage change thereof exceeds a predetermined value, provided in parallel with a voltage deviation detecting loop in an automatic voltage regulator for said generator, whereby when the instantaneous voltage change of the generator becomes more than a predetermined value, a transient response characteristic of said voltage regulator is caused to increase only for a predetermined period in response to said voltage change.
Inventors
- 👤 Masaomi Nagae
- 👤 Sumio Yokokawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:48
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/26; H02P9/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
139 words
An automatic voltage regulating apparatus for AC generator, which comprises an AC generator, an automatic voltage regulator for adjusting field system of said AC generator, a voltage deviation detecting unit for detecting a deviation of output voltage of said AC generator from a set voltage, a first means for imparting an output of said detecting unit to an input of said automatic voltage regulator, a second means for detecting an instantaneous value of the terminal voltage of said generator, a third means for differentiating the output voltage of said second means, a fourth means for generating an output when the output voltage of said third means becomes more than a predetermined value in each of positive and negative polarities, and a fifth means for applying the output of said fourth means to an input of said automatic voltage regulator.
Claim 2
Dependent Claim
139 words
An automatic voltage regulating apparatus for AC generator, which comprises an AC generator, an automatic voltage regulator for adjusting field system of said AC generator, a voltage deviation detecting unit for detecting a deviation of output voltage of said AC generator from a set voltage, a first means for imparting an output of said detecting unit to an input of said automatic voltage regulator, a second means for detecting an instantaneous value of the terminal voltage of said generator, a third means for differentiating the output voltage of said second means, a fourth means for generating an output when the output voltage of said third means becomes more than a predetermined value in each of positive and negative polarities, and a fifth means for applying the output of said fourth means to an input of said automatic voltage regulator.
Claim 3
Dependent Claim
167 words
In an automatic voltage regulating apparatus for AC generator, which comprises an excitor of said AC generator and an automatic voltage regulator for controlling excitation of said excitor in response to output states such as output voltage, output current and output power factor of said AC generator; the improvement comprising additionally a voltage change detecting unit adapted to detect the output voltage change of said AC generator and a blind sector setting unit connected at its input with the output side of said detecting unit and adapted to produce an output only when instantaneous voltage change detected by said detecting unit exceeds a predetermined value, the output side of said blind sector setting unit being connected at its output side with the input side of said automatic voltage regulator, thereby to increase a transient response characteristic of output of said automatic voltage regulator only for a period in response to an instantaneous voltage change of said generator when said voltage change becomes more than a predetermined value.
Claim 4
Dependent Claim
167 words
In an automatic voltage regulating apparatus for AC generator, which comprises an excitor of said AC generator and an automatic voltage regulator for controlling excitation of said excitor in response to output states such as output voltage, output current and output power factor of said AC generator; the improvement comprising additionally a voltage change detecting unit adapted to detect the output voltage change of said AC generator and a blind sector setting unit connected at its input with the output side of said detecting unit and adapted to produce an output only when instantaneous voltage change detected by said detecting unit exceeds a predetermined value, the output side of said blind sector setting unit being connected at its output side with the input side of said automatic voltage regulator, thereby to increase a transient response characteristic of output of said automatic voltage regulator only for a period in response to an instantaneous voltage change of said generator when said voltage change becomes more than a predetermined value.
References Cited (Backward Citations)
US2913656A
Cited
US3474323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |